Chuck for paper rolls



Jan. 31, 1967 H. EWING 3,301,499

7 INVENTOR. Lynn A. Ew ng BMZ HIS flTIORNEK Jan. 31, 1967 1.. H. EWING v 3,301,499

RRRRRRRRRRRRRRRR LS United States Patent C) My invention relates to a new and useful improvement in a chuck for paper rolls and more particularly to a rotatable chuck for insertion into a hollow core paper roll.

One object of my invention is to provide, in a device of this character, a means for adjusting the chuck axially on the supporting shaft and into the core of the paper roll so as to properly center the roll between the chucks and to rotatably secure the roll to the chucks for rotation therewith on the supporting shaft.

Another object of my invention is in the provision, in a device of this character, of a means for achieving a positive connection between the chucks, paper roll core, whether it be fibre or metallic, and the supporting shaft therefor, so as to insure the proper rotation of the paper roll on the shaft.

A further object of my invention is in the provision, in a device of this character, of a means for securing a cooperating base member upon a rotatable shaft supporting a paper roll core so that the base member may be utilized to forcibly insert a rotatable chuck axially on the shaft and interiorly of the paper roll core.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of par-ts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction, and in which:

FIG. 1 is a perspective view of my improved chucks for a paper roll to be used on a fibre core.

FIG. 2 is a fragmentary detailed sectional view of one of the chucks shown in FIG. 1, and

FIG. 3 is a perspective view of a pair of chucks for use with a metal core paper roll.

In the paper and printing industry, large paper rolls are generally formed by winding the paper on tubular cores or the like, which are formed of fibre or metal. These paper rolls may be of such a size that they will weight up to 3500 lbs. or more. It is necessary to provide suitable means for mounting the rolls of paper on suitable shafts which shafts are in turn mounted on a printing or other type of paper-using machine. These supporting shafts are generally mountable on such a machine by means of suitable bearings and, in many instances, are directly connected to a power mechanism of the machine so as to afford a positive drive for winding or unwinding the paper from the roll. These supporting shafts are of such a diameter that they extend through the center of the core of the paper roll and due to the size and weight of the paper roll, it is desirable that this supporting shaft be centered within the roll to prevent wobbling or shaking of the roll at high rotary speeds. Further, because the rolls are heavy, they tend to coast or slip on the shaft as the paper is unwound therefrom and therefore a non-slip connection between the core and supporting shaft is required.

To satisfy all of the above requirements, I have developed a cooperating pair of paper roll chucks exemplified in FIG. 1. The chucks are generally indicated as at 10 and 11. Each of the chucks 10 and 11 is provided with a center bushing 12 which is adapted to have journaled therethrough the paper roll supporting shaft 13 provided by the printing machine.

Referring to FIG. 1, it is to 'be noted that chuck 10 "ice includes an enlarged circular flange 14 extending radially from the bushing 12. One side surface 15 of the flange 14 is tapered outwardly in the general direction of the opposite side surface of the flange 14. An enlarged collar 16 is integrally formed on the chuck 10 on the flat side of the flange 14 opposite the bushing 12.

This collar 16 is of a diameter greater than the bushing 12 and is provided with a central opening greater than the diameter of the supporting shaft 13 inserted therethrough. Within the collar 16 is adapted to be positioned a split ring which, by means of a plurality of set screws, one of which is indicated at 17, and which are threadable through the collar 16 into bearing engagement with the ring, secure the chuck 10 to the shaft 13.

The bushing 12 of the chuck 10 is provided with a plurality of serrations 18 extending in a direction parallel to the long axis of the supporting shaft 13. The free outer edges of the bushing 12 and the serrations 18 are tapered away from the shaft 13 and in the general direction of the flange 14.

Referring to FIG. 1, I show that chuck 11 is similar in construction to chuck 10 in that it provides a serrated bushing 12 extending from one side of an enlarged flange 19 which flange is also provided with a tapered side surface 20. In place of the collar 16 provided by chuck 10, the chuck 11 has associated therewith a mechanism for forcibly inserting the serrated bushing 12 thereof into the hollow core of the paper roller. This mechanism includes a collar 21 which provides a laterally extending bushing 22. The bushing 22 is externally thread ed and is adapted to have threaded thereon a lock-up nut 23. This lock-up nut 23 is provided at one end with a circular bearing flange 24 which is adapted to bear against the outer circular surface 28 of the flange 19 of chuck 11. A split ring 25 is adapted to be inserted into a recess 26 formed centrally in the collar 21. By means of a plurality of set screws 27, the split ring 25 is frictionally secured to the shaft 13.

In use, the chuck 10 is journaled on the shaft 13 and through the split ring and set screws 17 frictionally attached thereto. This chuck 10 serves as a guide for positioning the paper roll upon the shaft 13. The shaft 13 together with the chuck 10 is then inserted into the paper roll core with the serrated bushing 12 of the chuck 10 projected inwardly of the paper roll core. The chuck 11 is then mounted on the shaft 13 and is moved axially thereof until its serrated bushing 12 is inserted into the hollow paper roll core. The lock-up mechanism includ ing the collar 21 and lock-up nut 23, is then journaled on the shaft 13 and brought into facial engagement with the flange 19 of the chuck 11. The collar 21 through the split ring 25 and set screws 27 are frictionally secured to the shaft 13. The lock-up nut 23 is threaded relative to the threaded bushing 22 of the collar 21 so that it will move in a direction away from the collar 21 and into bearing engagement with the outer face 28 of the flange 19 of the chuck 11.

This threadable movement of the lock-nut 23 will force the serrate-d bushing 12 into the core of the paper roll. It willalso effectively force the core upon the serrated bushing 12 of the chuck 10 so that the paper roll will be correctly centered on and about the supporting shaft 13. The paper core together with the chucks 10 and 11 will by this arrangement be rotatably secured to the shaft 13 and may be rotated therewith.

The confronting tapered side surfaces 15 and 20 of chucks 10 and 11 respectively have formed therein circular grooves 29 and 30. These grooves are spaced apart with respect to each other and function as an indicator to show that the amount of paper remaining on the roll is approaching the inner end.

The enlarged flanges 14 and 19 of the chucks 10 and 11 respectively are each provided with a circular cut-out 31 and 32 respectively adjacent the outer periphery thereof. These circular cut-outs 31 and 32 provide hand holes for each of the chucks and 11 and facilitate placing the same on the supporting shaft 13. The confronting tapered side faces and of the flanges 14 and 19 of the chucks 10 and 11 respectively prevent binding of the paper on the rolls against the chucks 10 and 11 and thus prevent tearing of the paper during the positioning of the chucks into the core of the paper roll and during winding or unwinding of the paper from the roll.

Referring to FIG. 3, I disclose a cooperating pair of paper roll chucks which are adapted to be used with a metal paper roll core. These chucks are substantially similar in construction and operation to the chucks 10 and 11 illustrated in FIGS. 1 and 2 and previously described.

The chucks of FIG. 3 which have similar parts are correspondingly numbered with prime numbers and will not be further described. The chucks of FIG. 3 when used with a metallic core of a paper roller, include a means of connection differing from the serrations 18 formed in the bushings 12 of the chucks 10 and 11 of FIGS. 1 and 2.

Referring to FIG. 3, it is illustrated that the chuck 10 is provided with binding lugs 33 which project laterally from the tapered side surface 15' of the flange 14' in a direction parallel to the tapered bushing 12, toward the confronting chuck 11. These lugs 33 may be in the form of pins as shown and are adapted to project into corresponding recesses formed in the opposite exposed edges of the metallic core supporting the paper roll. These spring pins, or lugs 33, prevent the metallic core from rotating or slipping free of the chucks 10 and 11'. It should be noted that the bushing 12' commences its taper toward the supporting shaft 13' at a point beyond the ends of the lugs 33 so that the initial insertion of the chucks 10' and 11 may be easily accomplished.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A device for securing a hollow core paper roll on to a rotatable supporting shaft comprising in combination (a) a pair of cooperating chucks, each of said chucks providing bushings journaled upon said shaft in spaced apart confronting relation,

(b) a radially extending flange carried by each of said bushings,

(c) one of said chucks having a shaft embracing collar extending from one side of its flange in a direction away from its bushing,

(d) means carried by said collar for releasably connecting said one of said chucks to said supporting shaft,

(e) a second shaft embracing collar for the other of said chucks providing an externally threaded bushing extending from said collar in the direction of said other of said chucks,

(f) means carried by said second shaft embracing collar for cooperating with said other of said chuck-s for connecting it to said supporting shaft, and

(g) means carried by said threaded bushing and movable thereover into engagement with said other of said chucks for axially moving said other of said chucks over said shaft in a direction away from said second shaft embracing collar so as to project said confronting bushings of each of said chucks into binding contact with the hollow core of the paper roll so as to center the paper roll between the radially extending flanges of each of said chucks.

2. A device as defined by claim 1 wherein the means carried by said collar for releasably connecting said one of said chucks to said supporting shaft, includes a split ring clamp carried concentrically about and in facial abutment with said shaft within said collar.

3. A device as defined by claim 1 wherein said means carried by said threaded bushing and movable thereover into engagement with said other of said chucks for axially moving the same, includes a lock nut threaded upon said bushing and movable into engagement with a portion of said other of said chucks for axially moving the same over said shaft.

4. A device as defined by claim 2 wherein said means carried by said threaded bushing and movable thereover into engagement with said other of said chucks for axially moving the same, includes a lock nut threaded upon said bushing and movable into engagement with a portion of said other of said chucks for axially moving the same over said shaft.

References Cited by the Examiner UNITED STATES PATENTS 4/1917 Pickett 24268.4 12/1928 Unruh 242-684 

1. A DEVICE FOR SECURING A HOLLOW CORE PAPER ROLL ON TO A ROTATABLE SUPPORTING SHAFT COMPRISING IN COMBINATION (A) A PAIR OF COOPERATING CHUCKS, EACH OF SAID CHUCKS PROVIDING BUSHINGS JOURNALED UPON SAID SHAFT IN SPACED APART CONFRONTING RELATION, (B) A RADIALLY EXTENDING FLANGE CARRIED BY EACH OF SAID BUSHINGS, (C) ONE OF SAID CHUCKS HAVING A SHAFT EMBRACING COLLAR EXTENDING FROM ONE SIDE OF ITS FLANGE IN A DIRECTION AWAY FROM ITS BUSHING, (D) MEANS CARRIED BY SAID COLLAR FOR RELEASABLY CONNECTING SAID ONE OF SAID CHUCKS TO SAID SUPPORTING SHAFT, (E) A SECOND SHAFT EMBRACING COLLAR FOR THE OTHER OF SAID CHUCKS PROVIDING AN EXTERNALLY THREADED BUSHING EXTENDING FROM SAID COLLAR IN THE DIRECTION OF SAID OTHER OF SAID CHUCKS, (F) MEANS CARRIED BY SAID SECOND SHAFT EMBRACING COLLAR FOR COOPERATING WITH SAID OTHER OF SAID CHUCKS FOR CONNECTING IT TO SAID SUPPORTING SHAFT, AND (G) MEANS CARRIED BY SAID THREADED BUSHING AND MOVABLE THEREOVER INTO ENGAGEMENT WITH SAID OTHER OF SAID CHUCKS FOR AXIALLY MOVING SAID OTHER OF SAID CHUCKS OVER SAID SHAFT IN A DIRECTION AWAY FROM SAID SECOND SHAFT EMBRACING COLLAR SO AS TO PROJECT SAID CONFRONTING BUSHINGS OF EACH OF SAID CHUCKS INTO BINDING CONTACT WITH THE HOLLOW CORE OF THE PAPER ROLL SO AS TO CENTER THE PAPER ROLL BETWEEN THE RACIALLY EXTENDING FLANGES OF EACH OF SAID CHUCKS. 